Magnetic Tether System

A Magnetic Tether System is a tool that uses magnetic forces to anchor, position, or control a biological specimen, enabling precise manipulation while minimizing direct physical contact. The system typically couples a specimen or tether to a magnetic element, then uses an external magnet or controlled magnetic field to generate attraction, restraint, or torque; changing field strength or position adjusts the applied force. In biology, magnetic tether systems support studies of cell mechanics, mechanotransduction, movement, and behavior by maintaining consistent experimental constraints while allowing observation of biological responses. They can improve control and reproducibility in assays that examine how organisms, cells, or tissues respond to mechanical forces.

Magnetic Tether System - Related Videos

Research

JoVE Journal - Biology

A Magnetic Tether System to Investigate Visual and Olfactory Mediated Flight Control in Drosophila

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Cited by 32 •

2008

Here we describe how to tether a fly in an olfactory magnetic-tether (OMT) apparatus. We describe how to align the rare-earth magnets and odor ports, and how to set mass flow rates for both the stimulus delivery and vacuum suction to achieve optimal odor tracking.

Research

JoVE Journal - Neuroscience
Free Sample

A Simple Flight Mill for the Study of Tethered Flight in Insects

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Cited by 37 •

2015

Flight in insects is influenced by a number of factors and the propensity to disperse is an important variable in understanding insect ecology and biological control strategies. We describe the construction and use of a simple, relatively inexpensive, and flexible flight mill for measuring parameters of tethered flight in insects.

Magnetic Tweezers for the Measurement of Twist and Torque

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Cited by 16 •

2014

Magnetic tweezers, a powerful single-molecule manipulation technique, can be adapted for the direct measurements of the twist (using a configuration called freely-orbiting magnetic tweezers) and torque (using a configuration termed magnetic torque tweezers) in biological macromolecules. Guidelines for performing such measurements are given, including applications to the study of DNA and associated nucleo-protein filaments.

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

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Cited by 5 •

2016

A scanner for imaging magnetic particles in planar samples was developed using the planar frequency mixing magnetic detection technique. The magnetic intermodulation product response from the nonlinear nonhysteretic magnetization of the particles is recorded upon a two-frequency excitation. It can be used to take 2D images of thin biological samples.

Education

JoVE Science Education - Physics

Magnetic Fields

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2023

Source: Yong P. Chen, PhD, Department of Physics & Astronomy, College of Science, Purdue University, West Lafayette, IN Magnetic fields can be generated by moving charges, such as an electrical current. The magnetic field generated by a current can be calculated from the Maxwell equation. In addition, magnetic objects such as bar magnets can also generate magnetic fields due to microscopic dynamics of charges inside the material. Magnetic fields will exert magnetic force on other moving...

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